/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package javax.servlet.jsp.tagext;

import javax.servlet.jsp.JspException;

/**
 * For a tag to declare that it accepts dynamic attributes, it must implement
 * this interface. The entry for the tag in the Tag Library Descriptor must also
 * be configured to indicate dynamic attributes are accepted. <br>
 * For any attribute that is not declared in the Tag Library Descriptor for this
 * tag, instead of getting an error at translation time, the
 * <code>setDynamicAttribute()</code> method is called, with the name and value
 * of the attribute. It is the responsibility of the tag to remember the names
 * and values of the dynamic attributes.
 * 
 * @since 2.0
 */
public interface DynamicAttributes {

	/**
	 * Called when a tag declared to accept dynamic attributes is passed an
	 * attribute that is not declared in the Tag Library Descriptor.
	 * 
	 * @param uri
	 *            the namespace of the attribute, or null if in the default
	 *            namespace.
	 * @param localName
	 *            the name of the attribute being set.
	 * @param value
	 *            the value of the attribute
	 * @throws JspException
	 *             if the tag handler wishes to signal that it does not accept
	 *             the given attribute. The container must not call doStartTag()
	 *             or doTag() for this tag.
	 */
	public void setDynamicAttribute(String uri, String localName, Object value)
			throws JspException;

}
